正则控制文本框只能输入正整数

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=GB2312" />
    <title>正则实现文本框只能输入正整数</title>
  </head>
  <body>
    <input type="text" onKeyUp="this.value=this.value.replace(/D/g,'')" onafterpaste="this.value=this.value.replace(/D/g,'')" />
  </body>
</html>

原文地址:https://www.cnblogs.com/BigGuo/p/3152920.html